%0 Journal Article
%A V. M. Babich
%T On the asymptotics of Green's functions for certain wave problems. II. Nonstationary case
%J Sbornik. Mathematics
%D 1972
%P 45-59
%V 16
%N 1
%U http://geodesic.mathdoc.fr/item/SM_1972_16_1_a3/
%G en
%F SM_1972_16_1_a3